2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
21 #include "core/rendering/svg/SVGResourcesCache.h"
23 #include "HTMLNames.h"
24 #include "core/rendering/svg/RenderSVGResourceContainer.h"
25 #include "core/rendering/svg/SVGResources.h"
26 #include "core/rendering/svg/SVGResourcesCycleSolver.h"
27 #include "core/svg/SVGDocumentExtensions.h"
31 SVGResourcesCache::SVGResourcesCache()
35 SVGResourcesCache::~SVGResourcesCache()
39 void SVGResourcesCache::addResourcesFromRenderObject(RenderObject* object, const RenderStyle* style)
43 ASSERT(!m_cache.contains(object));
45 const SVGRenderStyle* svgStyle = style->svgStyle();
48 // Build a list of all resources associated with the passed RenderObject
49 OwnPtr<SVGResources> newResources = SVGResources::buildResources(object, svgStyle);
53 // Put object in cache.
54 SVGResources* resources = m_cache.set(object, newResources.release()).storedValue->value.get();
56 // Run cycle-detection _afterwards_, so self-references can be caught as well.
57 SVGResourcesCycleSolver solver(object, resources);
58 solver.resolveCycles();
60 // Walk resources and register the render object at each resources.
61 HashSet<RenderSVGResourceContainer*> resourceSet;
62 resources->buildSetOfResources(resourceSet);
64 HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end();
65 for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it)
66 (*it)->addClient(object);
69 void SVGResourcesCache::removeResourcesFromRenderObject(RenderObject* object)
71 OwnPtr<SVGResources> resources = m_cache.take(object);
75 // Walk resources and register the render object at each resources.
76 HashSet<RenderSVGResourceContainer*> resourceSet;
77 resources->buildSetOfResources(resourceSet);
79 HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end();
80 for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it)
81 (*it)->removeClient(object);
84 static inline SVGResourcesCache* resourcesCacheFromRenderObject(const RenderObject* renderer)
86 Document& document = renderer->document();
88 SVGDocumentExtensions& extensions = document.accessSVGExtensions();
89 SVGResourcesCache* cache = extensions.resourcesCache();
95 SVGResources* SVGResourcesCache::cachedResourcesForRenderObject(const RenderObject* renderer)
98 return resourcesCacheFromRenderObject(renderer)->m_cache.get(renderer);
101 void SVGResourcesCache::clientLayoutChanged(RenderObject* object)
103 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
107 // Invalidate the resources if either the RenderObject itself changed,
108 // or we have filter resources, which could depend on the layout of children.
109 if (object->selfNeedsLayout() || resources->filter())
110 resources->removeClientFromCache(object);
113 static inline bool rendererCanHaveResources(RenderObject* renderer)
116 return renderer->node() && renderer->node()->isSVGElement() && !renderer->isSVGInlineText();
119 void SVGResourcesCache::clientStyleChanged(RenderObject* renderer, StyleDifference diff, const RenderStyle* newStyle)
122 ASSERT(renderer->node());
123 ASSERT(renderer->node()->isSVGElement());
125 if (diff.hasNoChange() || !renderer->parent())
128 // In this case the proper SVGFE*Element will decide whether the modified CSS properties require a relayout or repaint.
129 if (renderer->isSVGResourceFilterPrimitive() && !diff.needsLayout())
132 // Dynamic changes of CSS properties like 'clip-path' may require us to recompute the associated resources for a renderer.
133 // FIXME: Avoid passing in a useless StyleDifference, but instead compare oldStyle/newStyle to see which resources changed
134 // to be able to selectively rebuild individual resources, instead of all of them.
135 if (rendererCanHaveResources(renderer)) {
136 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
137 cache->removeResourcesFromRenderObject(renderer);
138 cache->addResourcesFromRenderObject(renderer, newStyle);
141 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);
144 void SVGResourcesCache::clientWasAddedToTree(RenderObject* renderer, const RenderStyle* newStyle)
146 if (!renderer->node())
148 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);
150 if (!rendererCanHaveResources(renderer))
152 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
153 cache->addResourcesFromRenderObject(renderer, newStyle);
156 void SVGResourcesCache::clientWillBeRemovedFromTree(RenderObject* renderer)
158 if (!renderer->node())
160 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);
162 if (!rendererCanHaveResources(renderer))
164 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
165 cache->removeResourcesFromRenderObject(renderer);
168 void SVGResourcesCache::clientDestroyed(RenderObject* renderer)
172 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
174 resources->removeClientFromCache(renderer);
176 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
177 cache->removeResourcesFromRenderObject(renderer);
180 void SVGResourcesCache::resourceDestroyed(RenderSVGResourceContainer* resource)
183 SVGResourcesCache* cache = resourcesCacheFromRenderObject(resource);
185 // The resource itself may have clients, that need to be notified.
186 cache->removeResourcesFromRenderObject(resource);
188 CacheMap::iterator end = cache->m_cache.end();
189 for (CacheMap::iterator it = cache->m_cache.begin(); it != end; ++it) {
190 it->value->resourceDestroyed(resource);
192 // Mark users of destroyed resources as pending resolution based on the id of the old resource.
193 Element* resourceElement = resource->element();
194 Element* clientElement = toElement(it->key->node());
195 SVGDocumentExtensions& extensions = clientElement->document().accessSVGExtensions();
197 extensions.addPendingResource(resourceElement->fastGetAttribute(HTMLNames::idAttr), clientElement);